Stone-cutting machine



UNITED STATES PATENT OFFICE.

GEORGE MORGAN, OE BROOKLYN, NEW YORK.

STONE-CUTTING MACHINE.

Specicaton forming part of Letters Patent No. 22,569, dated January 11,1859"; Ressued February 14, 1871, No. 4,263.

To all whom it may coacern:

Be it known that I, GEORGE MORGAN, ofl

the city of Brooklyn, in the county of Kings and State of New York, haveinvented a new and useful Machine for Cutting Stone; and I do herebydeclare that the following is a full, clear, and exact description ofthe same, reference being had to the annexed drawings, making a part ofthis specification, in which- Figure l, represents a perspective view ofmy machine. F ig. 2, is a longitudinal vertical section of the same.Fig. 3, is a front elevation of ditto. Fig. 4, is a longitudinal sectionof the cutter frame on a larger scale. Fig. 5, is a plan or top Viewbelonging to Eig. 4. Fig. 6, is a transverse section of my machine, theline B, B, Eig. 2, indicating the plane of section.

Similar letters of reference indicate corresponding parts in the severalfigures.

My invention consists in arranging cutters or chisels of graduallyincreasing lengths of t-he cutting edge in frames under hammers, in sucha manner that by the action of the hammers on the cutters, a rip is madethrough the whole length of a block of stone which is fed against thecutters, and of the depth of the longest and last or lowest one of thecutting edges, said cutters being so graduated that each edge increasesthe depth of the rip made by the next preceding cutter by each blow ofthe hammer.

To enable others skilled in t-he art to fully understand and constructmy machine, I will proceed to describe it.

A frame A, supports the carriage T, which slides in ways a, and whichforms the support for a block of stone which is to be operated upon bythe cutters. The cutters I, are arranged in frames J, J, one behind theother and their cutting edges are serrated, the edge being at an angleof about 300, in relation to the plane of the bed so that they assumethe appearance of inverted stairs. The frames J, J, work up and down inguides K, which are supported by stays L, and they are attached to crossbars M, which rest on spiral springs N, so that after each blow, thecutter frames are raised up to their original position.

Above the cross bars M, and guided by the frame A, are the hammers G,which are lifted and dropped by the action of wipers E, which areattached to the shafts D, and

which act on friction rollers E, which are attached to the hammers. Atthe upper end of thesevhammers spiral springs b, are arranged in such amanner that they are compressed when the hammers are raised, so as toincrease the force of the blows. At their lower ends these hammers areprovided with shoulders g, which act against cushions H, (Fig. 6) sothat any surplus force is intercepted.

Motion is conveyed to the shafts D, from the driving shaft O, by meansof gear wheels Of, and O, and the feed motion of the carriage T, iseffected by means of a ratchet wheel S, which is operated upon by a pawlR, which is -connected to an arm P, by a rod Q, and the arm P, ispivoted at one end to the frame A, while its other end is carried up anddown by an eccentric wrist pin d, which is attached to one of the wheelsO. The ratchet wheel S, is attached to a shaft f, which carries acogwheel U, at one end, and a pulley V, at the other. rlhe cog wheel U,gears into another cog wheel W, which is attached to a shaft m, whichextends under the carriage T, and a pinion is fastened to this shaftwhich gears into a rack n, which is attached to and which extends underthe carriage through its full length.

The operation is as follows. The stone is placed on the carriage in sucha position that the cutters are in line with that place through which arip is intended to be made, and the machine is started. As the stone isfed against the cutters by the action of the pawl R, and the ratchetwheel S, its end comes in contact with the shortest end of the serratedcutter and at each successive blow of the hammer the bed advances so asto bring an additional tooth of the cutter in contact with the stone,until the entire series or number' of teeth of the cutter blade isbrought into operation as represented in Fig. 2, of the drawing, andeach tooth takes off from the stone just as much as it projects beyondthe next preceding toot-h, and as the cutters are raised up after eachblow by the action of the springs N, their cutting edges are preservedand they offer no obstruction to the feed motion. By the time the fulllength of the stone has passed under the cutters an incision is madethrough the same, see Figs. 3 and 6, just as deep as the longest one ofthe cutters permits and if the cutters are long enough the thickestblock of stone may thus be Severed. By raising the paWl hammers G, andto a sliding carriage T, that R, the carriage is brought back to itsorigiby the action of the hammers on the cutters nal position by meansof the pulley V, Which an incision is made through the Whole length isdriven by a belt from a fast and loose of a block of stone which isplaced on the 5 pulley. carriage, substantially as and for the purposel5 Having thus described my inveniton, what specified. I claim as ne7and desire to secure by Let- GEORGE MORGAN. ters Patent, is- Witnesses:

The arrangement of cutters I, of gradu- WM. TUSCH, 10 ally increasinglength in such relation to J. W. GORMLY.

[FIRST PRINTED 1911.]

